Cross winding machine



Jan. 11, 1938. Y DERSEN 2,105,140

q CROSS WINDINGMACHINE Filed May 6, 1936 2 Sheets-Sheet. 1

am @211 -M CROSS WINDING MACHINE Filed May 6, 1936 2 Sheets-Sheet 2 INVEN I Patented Jan. 11', 1,938

- UNITED STATES- PATENT OFFICE CROSSWINDING Heinrich Del-sen, Crefeld, Gcrmanm assignor to Maschineni'abrik Oar! Zangs A.-G.'

(Her-m.

r Schroers Nachii.), Orefeld, Germany Application May 6, 1936, Serial a... 18,273 Germany August 22, 1935 '1 Claims. ('01. 242-43) the other, and in which the spool to be wound is driven by the grooved roller. The bobbins .produced on such machines present the inconvenience that in these cross wound bobbins the material accumulates more at the reversing points of the crossings, that is at the edges of the crosswound bobbin, than on the remaining portion of the bobbin. This is the more pronounced the thicker the bobbin is wound. These hard, projecting edges are very serious hindrance during the over-head drawing of-the threads from the bobbin, causing frequent breakage of the thread. The yarn is further easily damaged at these edges owing to relatively small surface of contact with the grooved roller.

4 The thick accumulation of yarn at the edges has a prejudicial elfect also on such bobbins which have to be subsequently dyed, as these edges ofier resistance to the penetration of the dye liquid. In cross winding machines according to the split drum system it has already been proposed to shift the split drums or the spools to and fro in lateral direction so that the threadon the edges displaces itselfor the thread guiding plate is rhythmically shifted so that, .at the running on of the thread on" to the spool, the travel of the thread is thereby shortened or lengthened. In the shifting of a whole row of drums, there occurs, however, the inconvenience of the drums rubbing constantly .onthe spools. Shifting of the thread guiding plate. causes the further inconvenience that the displacing of the crossing can take place only if a certain diameter has been attained. There is thus only very little possi- -bility of displacing the thread at the edges.

Arrangements have further become known in which the crossing of the thread is effected by a flyer thread guide or by a reciprocating thread guide, these being rhythmically shifted so that at the two edges of the bobbin displacement of the thread path takes place. In these last mentioned arrangementathe rubbing of the bobbin on the driving drum is eliminated but a slight wear of the elements producing the lateral move- 'ment of the mass endangers theformation of the perfect edge on the bobbin. Riding over of the yarn in a lateral direction on the bobbin edges frequently occurs and inevitably causes breaking of thethread during the subsequent drawing of the thread from the bobbin.

All these inconveniences are absolutely avoided by the present invention which relates to wind-' ing machines with grooved driving rollers. The displacing of the thread on the edges is in this instancefefiected by means of rhythmically moved limiting elements which temporarily prevent the thread from getting to the end point of the grooved roller but stop it prematurely. Thethread lifts itself outof the guiding groove in front of the reversing pointand is guided again by the same groove behind the reversing point. According "to the invention displacement of the thread at the edges of the bobbin can be efiected to such extent as has not been possible before.

The thread displacement at the edges of the bobbin is preferably effected in that the width of the layer changes, that is becomes greater and smaller. As the bobbin is produced without lateral shifting and the position of the thread guiding roller relative to the spool remains permanently. the same, accurately straight edges and a straight surface of the bobbins are produced owing to the thread laying which is efiected in accordance with the present invention. Riding over of the thread in lateral directions and damaging of the bobbins is thereby avoided. Thread breaking at the subsequent drawing of the thread is also avoided. Swelling formations which otherwise occurred on the edges are also eliminated. p

The elements for limiting the thread laying at the edges of the bobbins may be mounted on a bar extending through the whole machine in front of the grooved rollers. The lateral movement 'of this bar is derived either from a crank or from a cam disc. These elements are connected with an axle of the machine which rotates continually. In this embodiment of the invention the thread is laid alternately on the right and left edge of the bobbin. The arrangement may be constructed with the same result so that the two limiting elements are united to form a fork. The arms of the fork are the limiting elements, and are. mounted on a lever which is oscillatably mounted at one pivot point around which the-limiting elements oscillate to the'left and right according to the desired thread laying. Such a fork may be constructed so that the two arms extend at an angle the one to the other. In this instance the fork is reciprocated trans-, versely to the grooved roller. According to the inclined position of the arms serving as limiting elements for the thread laying, the displacement of the thread may be efiected alternately on the two edges of the bobbin or at both edges at themounted on rotating shafts arranged in front of a the grooved rollers.

The invention may be applied as required to cross bobbins to be woundcylindrically or conically.

Several embodiments of the invention'are dia- .of the limiting elements which are moved trans:

versely to the grooved roller, the lateral displacement of the thread to be wound being effected at the same time on both spool ends. Fig. 5 is a top plan view of Fig. 4. Fig. 6 is a front. elevation of Fig. 4. The operation is I as follows 2- The thread 2 from the storage bobbin I is guided by thegrooves I in the roller 3. -The' grooved roller 3 is" adapted to be constantly rotated durlngoperation of the device from any suitable source of power. The cross bobbin 5 to be formed'rests on this grooved roller 3 and is rotated by friction from said roller. The thread 2, conducted; through the grooves 4, is wound in a well-knownmanner.

In front of the point at which the thread 2 runs on to the grooved roller 3, the limiting elements 6 are arranged. To these elements a substantially' horizontal-displacement is imparted either parallel to the grooved roller (Figs. 1, 2, and 3) or transversely to this roller (Figs. 4, 5, and 6). As shown in Fig. 2 the lateral displacement of a bar I carrying'the limiting elements 6 is effected by a crank 8 having a predetermined stroke. This crank is continually rotated from a continually revolving element of the machine.

This element is in Fig. 2 the shaft 9 of the grooved roller and drives the crank through, a worm In on this shaft and a worm wheel I I. As shown in Fig. 3 bar I is shifted by a stepped grooved cam disc II. The amplitude of the lateral shifting of bar I and of the limiting elements 6' connected with the same, may be altered if desired. The elements 6 are adjustably nounted on bar 1. I

As shown in Figs. 4, 5, and 6 the limiting elements 6 are actuated by an eccentric crank ring l3, keyed on a shaft l4 continually rotated from a continuously revolving element of the machine. The eccentric crank I3 is connected at with a. sliderlB guided at I'l The limiting elements are fixed on this slider by means of a support l8 and they carry out a movement transversely to the grooved roller.

During the winding, the limiting elements are continually moved in the manner above described. The thread 2 running onto the grooved roller 3 is thereby prevented, according to the actual position of the limiting elements in advance of the reversing point of the grooved roller 3, following the groove all the way to its reversing point, since in front of this reversing point it moves out of the conducting groove to be caught again by the same groove on its reverse lap. The thread 2 can therefore not always get to the bobbin edge, and

the accumulation of material on the edges is prevented, the bobbin surface is made straight,'and damaging of the bobbin edge is obviated.

By adjusting the limiting elements, the thread displacing may be altered within limits .which could not be attained by the prior art.

This invention may also be applied to winding which the spool of the thread to reduce the extent of such movement for the purpose set forth.

. 2. In a cross winding machine, in combination, a revoluble cylinder having grooves formed in the cylindrical surface thereof for receiving and normally retaining and traversing a thread passing thereover in the formation of a cross wound bobbin, spaced secondary thread guiding members movable laterally of the normal field of traverse of the thread as determined by said grooved cylinder, and means for moving said secondary guide members to limit the width of the field of traverse 0 by limiting the lateral movements of the thread under the influence of the grooved cylinder.

3. The combination set forth in claim 2 in which the last mentioned means moves said sec-. ondary guide members simultaneously toward and away from the center of the normal field of traverse of the thread.

4. The combination set forth in claim 2 in which the last mentioned means moves said secondary guide members alternately toward and away from the center of the normal field of traverse of the thread.

5. The combination set forth in claim 2 in which said last mentioned means constantly alters the positions of said secondary guide members, for the purpose set forth.

6. In a cross winding machine, in combination, a thread guiding member comprising a revoluble drum having thread receiving and guiding grooves formed in the cylindrical surface thereof for laterally traversing a thread in alternate directions in the formation of a cross wound bobbin, auxiliary means for acting .upon a thread passing over said drum, and driving means for actuating said auxiliary means for intermittently limiting the lateral extent of traverse thereof at points just prior to reaching the normal point of reversal effected by said grooves, whereby building up of the thread at the ends of the thread package being wound is prevented.

7. In a cross winding machine, in combination, a primary thread guiding member comprising a revoluble drum having a pair of helical thread receiving and guiding grooves formed in the cylindrical surface thereof forlaterally traversing a 

